Ciales Municipio, PR

ZIP 00638

In ZIP 00638, 2 of the 12 things we check have at least one part graded D or F.

• Nearest Superfund site: Pesticide Warehouse III, 2.4 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Steri-Tech Inc. (39%), mostly polycyclic aromatic compounds.
• Fine particles (PM2.5) average 8.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.

Grades for ZIP 00638

• Superfund sites nearbyA to F
• Factories and industrial sitesB to C
• Oil and gas wellsA
• Air qualityB to D
• Past wildfire impactsA
• Past flood impactsC

Based on 6 census tracts · compiled September 10, 2026 · how each grade works and its sources

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